Unit heater for air spaces



A. A. BLOMFELDT UNIT HEATER FOR AIR SPACES Aug. 9 1927.

Filed Oct. 27. 1925 2 Sheets-Sheet 1 VENT-0Ry as, Q. M( x I,

aucun@ 9 192 Aug 7 A. A. BLoMr-ELDT UNIT HEATER FOR AIR sPAcEs 2 Sheets-Sheet 2 Filed Oct. 27. 1925 3mm/kou Usa/l Bzngjeldt,

sa? C, www' purposes,

Patented Auge, 1927.

.ALLEN AXEL :BLOMFELDL OFNEWPORT, KENTUCKY.

PATENT OFFICE.

UNITHEATER FOR AIRA SIEACES.

Application 'led Ouctober- 27, 1925.- Serial No. 65,107.

My invention relates vto improvements in heaters. One of its objects is to provide an improved heater for heating the interior of buildings of various types,

Wherever it' is cdesired to heat and gaseousontents of a' room or is to provide an heater which can be set in motion circulate the building. Another object improved and stopped at will, andin effect becomes immediately effective. other object is to provide an improved heater adapted to employ lHuid fu and for different which the heating el and to evacuate the products of combustion through a iiue,

and avoid the introduction of products of combustion into the atmosphere of the room.

Another object is to provlde a heatercasing having an eXit closed by a door and an air circulating member mounted upon the door.

Another object 1s to provide -for the regulation of the supply of air to the heater either .from the room or from each source.

its exterior,

vide a clean and sanitary he'ater available at short notice.

tion of components,

tion of the room.

invention also comprises certain details of form and arrangement, and combinaall of which will be fully on of the accomin Whlch: I

Figure 1 is a vertical section through a port-ion of a room to be heated with my im'4 proved heater in position in the upper por` Figure 2 is a plan of my improved heater partly in section to struction;

Figure 3 is a show the interior confront elevation loff the heater.

Figure 4 is a side elevation of the heater,

Fig. 2. o

The accompanying preferred embodiment of dravvings illustrate the my inventionv in which 15 represents the shell or casing of theh'eater unit, which has perforations 12 and 14 for screws andflegs or brackets 10 by Which itl may be.mounted the room to Figure upon the floor` of be heated, Where floor space therefor 1s avallable, and which, as shown in 1, is adapted to be' supported Ain an elevated position inthe upper portion of the or partiallyL Another object is to proroom, where floor space for'the heater is not available.

The heater unit 16 is mounted .Within the casing .15 preferably upon short legs 62 With an air jacket spacek upon all sides betweeny the heater unit and its casing. rlhe heater unit comprises a combustion chamber 17 at its lower end and a flue header-chamber 21 at its upper end, said combustion chamber-17 and flue header-chamber 21 being connected by means of a series of substantially vertical flues 18, through-Which heated products of combustion flow from the combustion chamber 17 .upwardly tothe flue header chamber 21', said flues 18`b'eing exteriorlyin contact with the air to be heated contained Within the casing 15. The heater unit 16 is adapted to be introduced into` the' casing 15 before the lidlof the casing 15 is attached thereto. The ues 18 are preferably in staggered relation andthe bulk of the air to be heated '70 isdesigned to be circulated incntact with the` exterior of said iues. n

A'series of gas or other fluid fuel burners 26 are located in the combu'stign chamber 17 beneath the lower ends of the respective vertical flues 18 and are respectively supplied with gas or other iuid fuel through a valve Vcontrolled fuel supply pipe 27 and ignited through a pilot light 40, While air to support combustion is' admitted to the combustion 80- chamber through the air intake port 28. y The products of combustion fiow upwardly through the vertical flues 18 and enter the ue header21, and thence through the ofi'- take flue 22 to a lchimney not shown'. A regu- 8 lating damper 29 is provided in the olf-take P Hue 22. i

The air to be heated may be taken from the room intothe casingl, through a port 30, ofwhich therefmay be more than one if desired. Air may alsobe taken from the exterior vatmosphere into'casing 15 through a port-or conduit 31. The port or ports 30 admit air from the room kto the interior of` the casing While the port 31 may be em- 95 ployed, if desired, to admit air from the exteriorof 'the room to the interior of casing 15. A damper 33 inthe pintor conduit provides for cutting oil' or regulating the air supply through the port 31. The air entering the -air heating chamber 20 of the casing 15 through the intake ports 30 or 31. is circulated about and between the vertical .iues 18 and over the exterior of heating unit 16 so vas to extract practically' all of thel heat from the products of combustion before the I l products of combustion reach the flue header 21, thereby quickly heating the air in the chamber 20. A major air off-take port orJ doorway 35 is adapted to lead the heated air from the chamber 20 of the casing 15 out into theroom to be heated under natural draft.

'One or more doors 32 are hinged to the doorway 35 so as to be employed to open or close said doorway. The doors 3K2 are pro-l 'vided with minor air off-take ports 36 through which heated air` is adapted to be circulated or fed from the heating chamber 20 into the room by means of power driven air circulating members 37, as for instance, variable speed electrically driven fans, which air circulating members are attached to and move with he doors 32.. In practice when the doors 32 are closed the fans are l set in' motion to supply a circulation of air to and from the heater at a rate which will maintain the desired room temperature,

yfor instance, during the day time or working hours. At night when less heat is required the circulating fans may be stopped and'/ the doors opened to allow air to cir- 'lair olf-take ports 36, but which are lifted to an inclined position? when the circulating fans are in motion., and in their inclined position serve to 'deliect the current of heated air downwardly into the lower portion of the room. The fuel and air supply to the combustion chamber is adapted to be regutain substantiallyl uniform temperature, in

al1 parts thereof. All products of lcombusan air inletrport, a relatively The apparatus herein shown and described is capable of considerable modication within the scopeof the claims without departing from the spirit of my invention.

What I claim is:

' 1. A heater comprising a casing having an air inlet' port, anl air heater member mounted within said casing to heat the air entering said casing through said air inlet port, a ycasing door havingan air exit port therein, and a power driven air circulating element mounted upon said door to drive the heated air from s'aid casing through said air exit port when the door is closed, said dbor when open affording alow pressure exit for the heated air and affording access to said air circulating element.

2. A heater comprising a casing having` 'an air inlet port, an `a1r heatlng member mounted within said casing, a door way leading from said casing and serving when the door is open as a low pressure exit port from said casing for heated air, a .door to closed said door way, la high pressure eXit v port for heated air through said door, and a power driven air circulating member mounted upon said door and access to which may be hadwhen said door is in open position.

3. A heater comprising a casing having an 'air inlet port from the room to be heated and a valve controlled air inlet port from the exterior of the building, and an air exit port to circulate the air to be heated through said casing, an enclosed heating member provided-with ya fuel supply conduit and air supply conduit leading thereto and an oiltake flue leading therefrom through the walls of said casing and means to maintain a forced circulation of air through the air exit port of said casing, saidheating member being mounted within said casing and externally in eontact with the air to be heated. p

4e A heater comprising a' casing having large air exit port for the escape of heate air under natlate d 3o/ Supply a greater'or less quantity 0fural draft, a door operable to open or close heat, as may bevrequired and when the fuel supply is cut 011 which may .readily and,

said relatively larlge'air exit port, a relatively small airexlt port through said door, ay power .driven air circulating member mounted upon said door in position to positively feed air under pressure through said relatively small. air exit port; and an air heater member mounted within said casing in contact with the air to be heated.

5. A heater com rising a casing having an I air inlet portan a doorway serving as a 'majorair exit port, Va heater lunit mounted- -within said casingl andadapted to heat air g l Said casing, a door to' circulated throu 1,oss,oss p close said doorway, a minor air exit port;- through said door, and y'a power actuated air circulating member mounted upon said door and adapted to produce a forced air 5jcircu1ation through said minor' air exit port.

6. A heater comprising a casing having an air inlet port and an air exit port, a heater unit mounted within said -casing,'a power f actuated air circulating member"adap'ted toi produce a forced circulation of air through 10 said casing, and a deector plate hinged above said air exit' port and supported `in an inclined position upon -the air currentescaping -from'said casing and serving to deflect said escaping air downwardly.

In testimony whereofI haveaixed my signature.

. N BLOMFELDT. 

